Anchorage device



Mgrch 19, 1929. w. H. WHEELER ET AL ANCHORAGE DEVICE Filed Feb. 17, 1927 il" f* f INVENTORS ATTORNEY ,Patented Mar.` 19, 1929.

' i UNITED sIAfTEs'PA-TENI oFFicE.

WILLIAM H. WHEELER, or NEW YORK, N. Y., AND JUnson o. LOGAN, '0E JERSEY CITY,

Y NEW JERSEY. I

YANCHORAGE DEvIcE.

Application ined February 17, 1927. `serial No. 168,908.

rThis invention relates to an improved means for anchoring a member to asuitable base in such a mannerthat it cannot beremoved without mutilating or disfiguring the member or the base.

Y An object of our invention is to provide an anchorage device that isparticularly adapted for securing` plates, bearing numbers orother identifying indicia, to automobiles or automobile parts, in such inanneras to prevent retherefrom. p n

N ith these and other objects 1n vlew our invention consists in certain novel features of construction and combinations and arrangements of parts as will be more fully hereinafter described and defined in the claims.

In' the accompanying drawings, Y Figure 1 is a view in longitudinal section, showing a plate attached to a basev by means of our anchorage devices; 5 Fig. 2 is a plan view of our anchorage device; and Fig. 3 is a side view of our vice partly broken awa-y.

Our anchorage device consists of two inein-` plug 11.@ The thimblc 1() is a vcup-,shaped member, the lower part of which externally threaded as vindicated at 12. VvAn external fiange 13 isprovided nearthe upper end of the thimble. The rim la of the thimble. vextends above tlierflange 13. and projects inwardly to form a lip 15. The outer margin of the lip 15 is preferably tapered or rounded as indicated at 16, but the inner face. of the lip, at its juncture With the cylindrical wall of the lip forms a ksharp corner 17, the purpose of whicliwvill be explained presently.

Vifithin the thimble 10 is placed the expander plug 11. The latter at its inner end is movable within the other, but inseparable anchorage def f bers, namelv, a thimble 10 and an expander' y formed with an annular flange 18, ofsuch diameter as to require the exercise of considerable pressure to force the plug past the .lip 15 'into the thimble. Hence, once the plug has been introduced into the thimble, it will not drop out andcannot be removed byordinary means. The plug is formed wit-ha cylindrical body portion 19, surmounted by a frusto-conical portion 2O that extends apf proximately to the plane of the face 16 ofthe rim 14:, when the plug is introduced into the thiinble. i

Fig. 1 illustratesthe manner in which our anchorage device is used for securing a plate 21toa base 22, The latter is formed with tivo `threaded holes 23 into which a pair of thim-v bles 10 are screwed. The holes 23 are preferably countersunk to provide seats for the flanges 13. The plate 211s formed on its un-` der surface with a pair offannular flanges 24: which are ladapted to enter the thimbles 10 in the annular spaces between the lips 15 and the expander plugs 11. The rounded corners 1G assist In guiding the flanges into thelthimbles. 4The under surface of the yplate 21 Vis formed with a recess 25 around each :flange to,J receive thel rim 141 ofthe ,thi'mble This recess serves the double vpurpose of pro- `vidinga Zone ofwealness in the plate at. the point of attachment and of permitting the thi'inble'to project above the bottomv plane of the plate, the advantage of which will be explained presently. The thimbles are of a size to'iit snugly into the threaded holes 23 `so that there will be'no danger of their working loose. A slot 26 cut through the rim of each thimble provides a hold lfor a screw driver with which the thimble is screwed into the hole 23.y

'Vhen the thimbles are in place, the plate 21 is attached to the base 22 by .inserting the flanges 211into the annular spacesbetwecn the plugs 11 fand the thimbles r10,. and then fore` ing the plate against the thimbles until the rims 14 .bear-'against the top of the recesses 25, and the bottom surface of the plate 21 bearsagainst the topof flange 13. In forcing the plate into this position the anges are flared outwardly, following the contour of the plugs 11, and thereby locking the plate to the thimbles, as indicatedv in Fig. 3. It will be understood, ofcourse, that one of the plugs 11, in Figl is shown in section and the other plug `is shown in full. The flanges 241 are of a thickness to fit'very tightly between the lips 15 and the portion 2O of the plug and also'be-` 'l causing the corner 17 of 2 meej/ee tween the portion l) and the inner well of the thimble. The sharp corners l? bite into the flanges Q4 and prevent the lutter "from being Withdrawn Jirom the thimble.

The Shape of the plug ll and the 'fact that it is not liza-ed to the thimble l0, play en importent pert in our invention. Because of its freedom or' motion Within the thin'ible the plug` can edjrust iteel' to the flange should `the letter be not eccuretely centered with respect to the thmble. Ae the Hnge is orcetl down over the plug, iV ie iiret flared by the 'truste-conical portion 2O and then pressed into enge' ement Witl the cylindrical portion 19, seizingthe l rer in hrm grip. if the plug` were integro `1 or immovebly eecurecl in the 'thimb e, it might be possible to withdrew the flange, but because the plug is free, and because of the tight grip or the ienge on the portion 19, the plug becomes firmly attachee to the i'engo one. will rise with 'the ilunge `when the le zt r ie drawn upward, 'the lip to bite into the flange enel bold it flfeet. Thie hold is eo )firm that the plate will teer ziloirbv the eren weakened by the reccfse 25, before 'the lip lo will sheer through the Harige.

@nce the ple-te 21 has been attached in this manner, it cannot be removed, because the thmbles 10 are made of very'l'iercl und tough metal hardened to Such a degree as to make it impossible te cut the metal Wit i save, drills or other tools. Any effort to crit through the thimbles would therefore be frustrated. The rim of the thim le extends so fer up into the plete that it would be imposeible ter e tlue't to sew through' the edge oi the plate clear ot the rrm, Without breathing through the upper tace of the plete, thereby mutiletmo' the plete and betraying the fact that it nml been tampered with. Any effort to pull th plete out of engagement Withtho thii'nblee woulfl result in tearing it along the part weakened by .1 u r the receeses 25. lt W uio be impossible to draw the temper' oi' the thimbles 10 Vithout cutting through the base from the rear or uncler Side, to expose the thimbles, and applying e torch to them; out the surface of the plete would be diecoloretl by the application oi' heet su'illiciently high ,to draw -he temper of the thimbles. Any e'lort to turn the thimbless en d unscrew them from the base into which they are Screwed very tightly would result in tearing out e. portion ot the plate.

Having thus Lleecribed our invention, enel with t ie underetunfling that Variations, moelliicetioes und alterations in f'f'ructurel details, maybe meile without de, ting 'from the scope oil' our invention, We claim:

l. As :in article of' manufacture, en anchordevice comprising e thimble having e conetrictecl mouth entl iforuietl with irieens'lor attachment to e bese, enden expend-er glug?,y Within the thimble and having t 'flange or euch Size estey preventthe 'flange 'from being pussiecl through the conetrictecl mouth except by the exercise et considerable pressure.

2. Ae en article of manufacture, an anchorage device comprising` e thimble of highly hardened motel l'ormed with means 'for uttecbment to ey bese and having en inwlrdly projecting lip, mtl e, plug Within the thimble, having o, ruste-conicel upper porLion and e cese 'lenge of euch Size are to prevent the ilzrnge 'from peeeing the lig Without the exercise oi' considerable ierce. Y

3. is en article of manufacture, an encherege clevce comprising e thimble 'formed with en outuferclly projecting flange below Jthe rim o'i the thimble and aninwerdly projeciino iip, the body o'i' the tbimble being eziteriorly three/fied below thu i'lnnge, intl a plug hei/*ing o, rusto-conicel lupper portion, a cylindrical Vmedian portion und Iilengetl lower portion, the letterbeing1 ei e eine to pertlie plug to be 'ercetlwith confaicleruble precsure past the lip into the thimble.

WLLAM H. VHEELEE. JUDSQN C. LUGAN. 

